Date: Wed, 1 Apr 1998 12:04:26 -0500 (EST) From: spork <spork@super-g.com> To: Terry Lambert <tlambert@primenet.com> Cc: Ollivier Robert <roberto@keltia.freenix.fr>, hackers@FreeBSD.ORG Subject: Re: NFS over TCP Message-ID: <Pine.BSF.3.96.980401110439.26228A-100000@super-g.inch.com> In-Reply-To: <199804010644.XAA16209@usr02.primenet.com>
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> > I don't think you can limit UDP usage in the portmapper. I'm afraid that
> > the first call to the portmapper will always be in UDP.
>
> This is correct. As will the first mount request.
>
So what about the second mount request? ;)
portmapper on the remote machine claims everything is available via tcp.
nfsd started with the -t flag:
fooclient# rpcinfo -p fooserver
program vers proto port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100003 2 tcp 2049 nfs
100003 3 tcp 2049 nfs
100005 3 udp 931 mountd
100005 3 tcp 1003 mountd
100005 1 udp 931 mountd
100005 1 tcp 1003 mountd
Call the mount:
fooclient# mount_nfs -T -3 -s fooserver:/usr/src /usr/src
NFS Portmap: RPC: Port mapper failure - RPC: Unable to send
Ditto on "showmount". Tries udp and then gives up:
This goes on until max retries is reached and then fails. IPFW shows
this:
Apr 1 11:12:32 fooclient /kernel: ipfw: 6099 Deny UDP 207.240.140.yyy:953
207.240.140.xxx:111 out via vx0
Showmount also tries udp once then exits:
fooclient# showmount -e (-3 or not) fooserver
RPC: Port mapper failure
showmount: can't do exports rpc
So should I call this "broken" and file a pr? The manpages are silent on
the subject, and the referenced RFC dates back to 1989. I've yet to find
the document titled "NFS: Network File System Version 3 Protocol
Specification, Appendix I". This is -stable as of two days ago.
I was digging through cvsweb
(http://www.freebsd.org/cgi/cvsweb.cgi/src/sbin/mount_nfs/mount_nfs.c)
and I did find a commit from long long ago (vers. 1.9) that had this
comment:
"Fixed bug where UDP was required to mount a TCP NFS filesystem.
Submitted by: Ken Hornstein, Sept.'94"
Is it possible someone unfixed it?
Shall I file a pr, or is there more information to gather?
It seems as if rpcinfo is the only thing that actually does tcp queries...
Thanks,
Charles
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